Rolling door



Jan. 27, 1925: 1,524,079

J. C. A. BONENFANT ROLLING DOOR Original Filed March?) 1920 INVENIOR 07,6 05mm emf BY 6. d'g'efh/zswau fi/ ATTORNEY Patented Jan. 27, 1925.

JOSEPH CLOVIS ARTHUR BONENFANT, OF MONTREAL, QUEBEC, CANADA.

ROLLING noon. v

Application filed March 2, 1920, Serial No. 362,751. Renewed June 23, 1924.

Y '0 all whom it may concern:

Be it known that r I, JOSEPH CLovIs ARTHUR BONENFANT, a subject of the King of Great Britain, and residing at 67 Notre Dame Street, East, in the city and District of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented a new and useful Rolling Door, of which the following is the specification.

The invention relates to rolling doors as described in the present specification and illustrated in the accompanying drawings that form part of the same. i

The invention consists essentially in the novel means employed whereby the operation is much facilitated. i

The objects of the invention are to eliminate the manual exertions required in opening and closing fire box andother doors; to increase the efficiency in firing for steaming purposes; to furnish a door that may be opened coincident with the operations in feeding and instantaneouslyclosed at each operation; to devise a simple and effective mechanism, which lessens the force required for the initial effort; and generally to provide a serviceable and durablerolling door.

In the drawings, Figure 1 is an elevation of the door and frame, showing a portion of the frame and the rack rod connector broken away and also the front of the furnace shown broken away.

Figure 2 is a side elevation, showing the operating mechanism, and the door frame partly broken away and the gear mechanism disclosed.

Figure 3 is a side elevation, without the locking ring and disclosing a full view of segmental gear rack and actuating lever by removing a part of the casing.

Figure 4 is a perspective detail of the driven gear.

Figure 5 is a detail of the locking ring.

Figure 6 is detail of the operating pedal with connecting parts broken away.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, the door 1 is formed in pivotally joined sections 2 rolling on the segmental rolls 3, to which the upper section is connected by the links 4. The links 4 and the ends 5 of the sections 2 are recessed on the inner sides to corre spond to the periphery of the rolls 3.

The rolls 3 are fixedly mounted on the shaft 6 journalled in the bearings 7 extending from the door frame 8, the latter having the vertical slide grooves 9 at the sides for holding the sections 2 closely to their place in the operation of the door.

The segmental gear 10 and lever 11 are fixedly mounted on the shaft 6 outside the bearing 7 and preferably are integral with one another, that is to say, the segmental gear 10 has the lever lateral extension 11 therefrom to one side of the centre of said gear. The segmental gear 10 is secured to the shaft 6 by means of the set screw 12 through the boss 13 or in any suitable manner. v

The rack and kicker bar 14 is preferably in one piece, having the teeth 15 on one side in the upper portion of the bar, the kicker head 16 projecting from the other side and having an inclined top surface 17 and the forked lower end 18.

The crank lever 19 is pivotally secured in the bracket 20 standing on the flooring in front of the furnace and engages at the one end the forked end 18 of the kicker bar 14 and is engaged at the other end by the foot pedal 21. p

The kicker bar 14 engages the segmental gear 10 and is held to its engagement by the roller 22 journalled on the pin 23 projecting from the boss 24 on the door frame.

The head 16 is normally under the lever extension arm 11 and on raising the kicker bar 14 by pressing on the pedal 21, the inclined head 16 hits the arm 11 thereby turning the gear 10 and imparting to the door an initiatory movement, the further movement of the opening gear being con tinued by the engagement of the teeth of the rack with the teeth of the segmental gear, but head 16 by hitting the arm 11 initiates the motion of segmental gear and consequently the rolling door and the strain of the starting movement incident to the short leverage indicated by one half the diameter of the gear is overcome by increasing that leverage to the length of the extension arm. In addition, it may be said that the kick given by the head 16 to the arm 11 materially adds to the ease in which the initial movement is accomplished by this invention.

The locking bar 25 is in three-quarter ring form and is formed with the radial slots 26 and lugs 27, 28, 29 and 30, said lug 30 forming the bearing for the outer end 'ofthepin 23 carrying the roller 22 between the boss 24 and lag 30, said lugs 27;, 28 and 29 being secured tothe door frame by the pins 31, thereby permitting ample room for the operation of the arm 11.

'The locking bolt 32 is pivotally secured .to the arm 33 fixedly mounted on the shaft 6 and swings into one or other of the slots 26 to lock the door to the open position desired; r a v lhegrboved pulley 3.4 is. mounted on the other end of the shaft .6 and a chain 35 winds thereon and *thischain is connected by the spring 36 to the lower end of the frame and winds, on said pulley against said spring tension on the closing of the door and therefore forms a shock absorber and balance. v

'cVarious changes may be made in the construction of this invention without departing from the spirit of the invention, and so long as these changes are within the scope ofthej claims for novelty following, the protection accorded shall not'be invalidated. 7

* .What I claim is.:

1. In a rolling door for a furnace, the combination with a plurality of sections and rolls, of a rack and gear operating mechanism having a lever extension from the gear coacting With -a kicker extension from the rack in efi'ecting the initiating movement in the. opening of th-esdoor.

2. In :a rolling ,door for a furnace, the

combination with a plurality ofisecti-ons and rolls, of a rack and gear mechanism in operative relat on to said rolls, said rack having a head projecting therefrom beneath an arm projecting fno n said I r.

3. In :a rollin door for a urnace, the combination with a plurality of sections and rolls, of a rack and gear mechanism in arings, segmental rolls kicker bar suitably operated at its lower end and terminatingina kicker head and having a rack on the inner side thereof enacting with said gear, a locking bar in part ring for-m rigid with the door frame and having slots and a eoacting locking bolt rotatively secured to said shaft, said locking bar having outwardly projecting radial lugs for connecting it to the frame and inwardly extending )in projection to the frame adjacent to sai kicking bar, and a roller engaging said vkicking bar and jonrnalled on said pin rejection and forming a keeper for said Kicker bar.

Signed at the city of Montreal, Province of Quebec, Dominion of Canada, this 10th day of October, 1919.

JOSEPH CLOVIS ARTHUR BONENFAN'I'. 

